Common name : Japanese basket clam, or Japanese blue clam

Aspect : The shell is generally triangular and measures up to 3 cm, adorned with around forty concentric edges, lustrous for the external face and dark brown to olive-green. The internal surface is white with a more or less clear purple mark along the margin and muscle traces. The dorsal edge is thick decorated with three cardinal teeth and a clearly developed lateral tooth.

Feeding : filtration of suspended phytoplankton => accumulation of pollutants

Environment : fresh and brackish water in various types of sediment. invasive species of Asian origin introduced in 1980 in Europe via the Rhine and Rhône canals.NB the great absorption capacity of this species contributes to the clarity of the waters of the Loire and its tributaries but harms the development of fish